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The objectives of this study were to generate precise estimates of suicide rates in the military while controlling for factors contributing to rate variability such as demographic differences and classification bias, and to develop a simple methodology for the determination of statistically derived thresholds for detecting significant rate changes. Suicide rate estimates were calculated for the military population and each service branch over 11 years, directly standardized to the 2000 U.S. population. Military rates were highly comparable across branches and were approximately 20% lower than the civilian rate. Direct adjustment essentially controlled for the demographic confounds in this sample. Applying the Poisson-based method, we demonstrate that suicide rate fluctuations as large as 20-40% in any year may be attributed to random error. 相似文献
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Studies of speech perception first revealed a surprising discontinuity in the way in which stimulus values on a physical continuum are perceived. Data which demonstrate the effect in nonspeech modes have challenged the contention that categorical perception is a hallmark of the speech mode, but the psychophysical models that have been proposed have not resolved the issues raised by empirical findings. This study provides data from judgments of four sensory continua, two visual and two tactual-kinesthetic, which show that the adaptation level for a set of stimuli serves as a category boundary whether stimuli on the continuum differ by linear or logarithmic increments. For all sensory continua studied, discrimination of stimuli belonging to different perceptual categories was more accurate than discrimination of stimuli belonging to the same perceptual category. Moreover, shifts in the adaptation level produced shifts in the location of the category boundary. The concept of Adaptation-level Based Categorization (ABC) provides a unified account of judgmental processes in categorical perception without recourse to post hoc constructs such as implicit anchors or external referents. 相似文献
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Jessica M. Wilson 《Inquiry (Oslo, Norway)》2013,56(5-6):535-579
It has recently been suggested that a distinctive metaphysical relation— ‘Grounding’—is ultimately at issue in contexts in which some goings-on are said to hold ‘in virtue of’’, be (constitutively) ‘metaphysically dependent on’, or be ‘nothing over and above’ some others. Grounding is supposed to do good work (better than merely modal notions, in particular) in illuminating metaphysical dependence. I argue that Grounding is also unsuited to do this work. To start, Grounding alone cannot do this work, for bare claims of Grounding leave open such basic questions as whether Grounded goings-on exist, whether they are reducible to or rather distinct from Grounding goings-on, whether they are efficacious, and so on; but in the absence of answers to such basic questions, we are not in position to assess the associated claim or theses concerning metaphysical dependence. There is no avoiding appeal to the specific metaphysical relations typically at issue in investigations into dependence—for example, type or token identity, functional realization, classical mereological parthood, the set membership relation, the proper subset relation, the determinable/determinate relation, and so on—which are capable of answering these questions. But, I argue, once the specific relations are on the scene, there is no need for Grounding. 相似文献
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John K. Cochran Christine S. Sellers Valerie Wiesbrock Wilson R. Palacios 《Deviant behavior》2013,34(9):790-817
The research literature on intimate partner violence (IPV) has documented a number of poignant facts that serve as the foundation for this study. First, IPV is prevalent, frequent, and often repetitive. Moreover, repetitive violence within an intimate relationship tends to escalate over time, both in its frequency of occurrence and in its severity. We also know that decisions to leave the relationship do not guarantee that the violence will end. In addition, the phenomenon of “mutual combatancy,” prevalent in many intimate partner relationships, suggests that both parties in this dyadic process co-share the roles of offender and victim. Finally, we know that targets of IPV, like their abusers, tend to disproportionately come from families-of-origin in which violence and aggression were directly and/or vicariously experienced. These facts suggest that one possible starting point for the exploration of repetitive intimate partner victimization (R-IPV) may derive from an inter-generational transmission, or cycle of violence theory, suggested more formally in social learning approaches to criminal and deviant behaviors. The present study examines the extent to which measures of Akers' social learning constructs are able to predict repetitive intimate partner victimization. Self-report data on intimate partner violence among a sample of college students reveal the social learning theory variables, differential association and differential reinforcement in particular, are able to predict both the prevalence and frequency of predict repetitive intimate partner victimization. 相似文献